The Phase II randomized controlled trial is guided by four specific aims. The first aim is to diversify the prototype Motivational Interviewing Simulator to meet the needs of a wider audience. Based on Phase I findings, we will build on the prototype by adding a Single Player Arena, expanding the existing Two-Player Arena, and creating an Advanced Free-play Arena where learners can go beyond basic MI skills. Additionally, the expanded product will include multiple scenarios, story-lines, and characters for each arena, and multiple levels of play for each scenario. The second aim is to evaluate the Simulator through a randomized controlled trial. The third aim is to disseminate findings. And the fourth aim is to prepare for commercialization.